Average Calculator
Paste your numbers. Get the mean, median, mode, sum and more, instantly. The math runs in this tab, so nothing is uploaded.
- Runs in your browser
- No account
- Thousands of numbers
- Free
Find the average
Separate with spaces, commas or new lines. Paste a whole column straight from a spreadsheet.
Show the working
Weighted average
For grades, portfolios or anything where some numbers count more than others. Full weighted average calculator →
How to find the average
Add them up
Put every number in the list together to get the sum. For 4, 8 and 15 that is 27.
Count them
How many numbers are there? Here it is 3. Zeros count, blanks don't.
Divide
Sum divided by count: 27 ÷ 3 = 9. That is the average, also called the mean.
Mean vs median vs mode
All three are "averages". They answer different questions about the same list. Take 1, 2, 2, 9:
Mean = 3.5
The sum (14) divided by the count (4). It is pulled toward big outliers like the 9. Mean calculator →
Median = 2
The middle value once sorted. With an even count, it is halfway between the two middle numbers. Median calculator →
Mode = 2
The value that shows up most often. A list can have no mode, or more than one.
Questions people ask
How do you calculate the average of numbers?
Add all the numbers together, then divide by how many numbers there are. For 4, 8 and 15: 4 + 8 + 15 = 27, and 27 ÷ 3 = 9. The average is 9.
Is the average the same as the mean?
In everyday use, yes. 'Average' almost always means the arithmetic mean: the sum divided by the count. Median and mode are other kinds of average that describe the middle value and the most common value.
What is the difference between mean, median and mode?
Mean is the sum divided by the count. Median is the middle value once the numbers are sorted. Mode is the value that appears most often. For 1, 2, 2, 9 the mean is 3.5, the median is 2 and the mode is 2.
What if there is no mode?
If every number appears only once, the list has no mode. If two or more values tie for most frequent, the list has more than one mode and the calculator shows all of them.
Can I paste numbers from Excel or Google Sheets?
Yes. Copy a column or row and paste it in. Spaces, commas, new lines, tabs and semicolons all work as separators. Currency signs, percent signs and units are ignored. Note that a comma is treated as a separator, so type 1000 rather than 1,000.
Which standard deviation is this?
The sample standard deviation, which divides by n − 1. It matches STDEV in most spreadsheets. The population version (divides by n) is slightly smaller.
Are my numbers uploaded anywhere?
No. The math runs in your browser with JavaScript. Nothing you type into a calculator is sent to a server, and no account is needed. The only sign-in on the site is the optional comments page.
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